Guys, answer is very clear.
If we really love someone, we should fight for him/her, and don't give up, try with our all power to do our best.
And what was Rose doing all the time?
She was keeping on telling Jake that their relationship was too dangerous, that they should break up etc. You remember "The Academy"? They kissed, but as soon as they arrived at a school party and Brad asked her to dance with him - she didn't say anything, she did dance with him!
Summing up - there is no sense in relationship, where only one person cares. Then, why should Jake continue dating with Rose?
When he has Danika, who has forgiven him and they enjoyed a graduation party together?
Answer yourself! :)